First API testing video tutorial is available at: https://www.youtube.com/watch?v=Hdh4b_aMwuA
Java Tutorials are available at: https://www.seleniumtests.com/p/java-training-tutorial-videos.html
This video covers -
1. Introduction to Jersey Client
2. Sample Jersey Client application -
http://docs.oracle.com/cd/E19776-01/820-4867/ggrby/
3. Using json based application
4. Testing get Request from chrome rest client -
5. Use jersey client to perform API test
Project used in this video can be downloaded from here -
http://manual-and-automated-testing.1070.x6.nabble.com/API-Testing-Project-tp5001779.html